It is bugged, tested it with a friend, once i Ieleased a arrow shot, he dodge it, and then dodged 4 more shots in a row. Dodge is a 20 percent chance, not 100 percent.
This is why all the NBs are spamming it, makes sense now.
Simple.... BUT
Test show you dodge more then 20 percent, on melee its about right, but in range its 100 percent dodge chance.